Tripping mechanism for cylinder printing-machines.



R. MIEHLE.

TRIPPING MECHANISM FOR CYLINDER PRINTING MACHINES.

APPLICATION FILED JULY 26, 1911.

Patented Oct. 27, 1914.

2 SHEETS-SHEET 1.

Hit NORRIS F'EI'E'RS C0 PHUH'J urn WASHINI/IHN R. MIEHLE.

TBIPPING MECHANISM FOR CYLINDER PRINTING MACHINES.

APPLICATION FILED JUL! 26, 1911,

1,1 15,083. Patented Oct. 27, 1914.

2 SHEETS-SHEET 2.

WITNESSE W lNl/E/VT A TTORIVEYS "IE uonms PFTEN mum ulna. WASMING'ON. 0 cv UNITED I STATES I PATENT oFFIoE- ROBERT MIEHLE, OF CHICAGO, ILLINOIS, ASSIGNOR TO CONTINENTAL & COMMERCIAL TRUST & SAVINGS BANK, TRUSTEE, OF CHICAGO, ILLINOIS.

TRIPPING MECHANISM FORCYLINDER PRINTING-MACHINES.

To all whom it may concern:

Beit known that I, ROBERT Mlnnnn, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in TrippingMechanisrn for Cylinder Printing-Machines, of which the following is a description, reference being had to theaccompanying drawing and to the letters and figures of reference marked thereon.

This invention relates to the tripping mechanism and the mechanism for raising and lowering the impression cylinder of flat bed or rotary printing presses, and is of particular service in connection with thosepresses in which the. cylinder has two or more revolutions for one impression, though the invention is not to be so restricted.

An object of the invention is to provide means for lowering the impression cylinder, which may be readily assembled and free from cramping or binding during action.

A further object of the invention is to provide a cylinder-lowering mechanism, which may be quickly and easily tripped, so as to become ineffective, and to further construct said trippingmeans whereby the same may be manually actuated at any time, and will. operate to trip the lowering mechanism only when the impression cylinder is raised.

These andother objects will in part be obvious, and will in part be hereinafter more fully described. a a

In the drawings, which show by way of illustration one embodiment of the invention,--I igure I is a side view in elevation of a two-revolution printing press, the impression cylinder being in printing position; Fig. II is a similar view, showing a portion of the cylinder-raising and lowering mechanism when the impression cylinder is raised or in a non-printing position; Fig. III is a similar view, the impression cylinder being in a raised 01' in a non-printing position, and the trippingmechanism being in an operative position; F IV is a front elevation, partly in section, of the Specification of Letters Patent.

Application filed July 26, 1911.

screwed into the impression block .5.

Patented Oct. 27,. 1914. Serial No. 640,681..

l, which pass through them, the upper end of the said extension rods being provided with the nuts 6. The said extension rods l pass downward through an opening in the main frame, which guides them in their movement when raised or lowered, and are The said extension rods-l also pass through the supporting springs 7, which are incased in chambers in the side frame.

The height of the cylinder 2 may be' regulated by means of the long screw or post 8 or abutment, which screws into the press frame and is further held in place by the set screw 9 and lock nut 9. The end of the said screw or abutment 8 is shaped like a hall 10, which fits into a ball or cup-like socket in the block .11. thus forming a ball and socket joint. This ball and socket joint is of advantage, as it allows the adjoining parts to attain their true hearing when put together. In the lower side of the said block 11 is a trans verse socket groove into whichthe upper end A. of the toggle lever 12 operates. The ball and socket joint above mentioned, together with the working of the upperend A. of the toggle lever 12 in the said transverse socket groove in the block 11 forms a toggle joint, which is brought slightly over the center vertical line of the cylinder by the cam 20, in order that it may not work back when under pressure. i

The lower end B of the toggle lever 12 i operates in a transverse socketgroove in the top of the block 5. Thearm C of the toggle lever 12 extends downward, and connects with the short connecting-rod 1 13 which connects with the rocking arm 14, which rocks with the rock shaft 15, extending from side to side of the press. The travel to the left of the said arm C is limited by the set screw 38 in the press frame. The set screw or stop 38 is so positioned as to take all pressure of the operating cam from the raising roll when the impression cvlii'ider raised, thus allowing the easy withdrawal the roll or the tripping of the actuating mechanism, as will be hereinafter more fully described. it stop 38 engages the arm C, when the members of the toggle lever are in position to hold the impression cylinder lowered.

The mechanism thus far described is the same on each side of the press.

Returning to the right side of the press, extending from the rocking arm 1% and integral with it, is the arm 16, in which the stud 17 has bearing, said stud 17 at its outer end having a friction roller 18, which operates in the cam groove 19 of the cam 20, seemed to the cam shaft 21. The circular flange 22 extends all the way around the edge of the cam 20, as shown in F VII. Loosely mounted on the said rock shaft 15 is a sector trip cam 23, in which a stud and friction roller 2 operates to move the stud. 17 and friction roller 18 in and out of the cam groove 19. The said stud and friction roller 24 is secured to the face of the stud 17, said face being formed by cutting away part of the stud 17 which faces the said trip cam 23. The collar 23 serves to hold the trip cam 23 in position on the shaft 15. The long connecting rod 25 connects the trip cam 23 to the lever 26, which is secured to the rod 28. Also secured to the rod 28 is the lever 27, which is connected with the vertical rod 29. The lug 35 on the lever 26 limits the upward travel of the vertical rod 29 by coming into contact with the pin on the press frame. About the middle of the said vertical rod 29 is fixed a collar 30, upon which rests the spring 31 which supports the foot key 32. The said foot-key 32, which is free to slide upon the said vertical rod 29, has a lug 33 adapted to hold the said foot-key in a depressed position, as shown in Fig. III, by engaging under the platform The spring 37 is attached to the lever 28 and to the platform 34%, and tends to raise the said lever 28.

The detailed operation of the mechanism cam groove 19, the vertical line of the above described toggle joint is broken gradually, thus allowing the supporting springs 7 to raise the cylinder, as shown in Fig. III, without a sudden bump. Just as the cylinder reaches its highest position, the said friction roller 18 begins to pass over the portion a of the cam groove 19, said portion 0 being slightly wider than the rest of the said cam groove 19, the outer wall being cut away flush with the flange 22. The cylinder is held in such raised position while the said friction roller 18 is passing over the said portion 0 of the cam groove 19, the said roller being held about the middle of the said portion 0 (free from both sides) by means of the arm C of the toggle lever coming into contact with the set screw 38. If the foot-key 32 is depressed while the said friction roller is thus moving, without contact in the portion 0 of the cam groove 19, the sector trip cam 23 is swung over, thus causing the stud 17, and consequently the. friction roller 18, to be pulled out to an inoperative position, because of the operating of the stud 24 in the inclined portion of the said sector trip cam 23, see Fig. V. As long as the foot-key 32 is so depressed, the friction roller 18, on the stud 17, remains in such inoperative position, as shown in Fig. III, thus tripping the cylinder by causing it to remain in its raised or non-printing position. However, if the sector trip cam 23 is positioned for tripping the cylinder, by depressing the foot-key 82, while the friction roller 18 is in portion a of the said cam groove 19, the said sector trip cam has no influence on the stud 2e, because the said stud does not reach the incline on the said sector trip cam. If the said foot-key 32 is depressed when tne said friction roller 18 is in portion 6 or d of the cam groove 19, the binding of the stud 17 in the arm 16, caused by the force of the springs 7, prevents the said-sector trip cam 23 from getting into the tripping position, thus overcoming part of the force of the spring 31, until the said friction roller 18 enters the portion 0 of the cam groove 19, when the freeing of the said roller 18, as above described, allows the said sector trip cam 23 to operate. At any time the said foot-key 32 is released, the friction roller 18 butts against the surface of the cam 20 until it reaches the portion 0 of the cam groove 19 into which it is pushed because of the action of the spring 37, which causes the sector trip cam 23 to be swung back into its original position. As the said friction roller 18 passes over the portion (Z of the cam groove 19, the vertical line of the above described toggle joint is gradually regained, thus gradually lowering the cylinder for the printing stroke.

It is obvious that minor changes in the details of construction and the-arrangement of parts may be made, without departing from the spirit of the invention as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a printing press, in combination, an impression cylinder, means to raise and lower said cylinder, said lowering means comprising a member having a grooved cam and a member adapted to co'ciperate with the groove of said cam, and means to withdraw said member from said groove and to destroy their cooperative relation, said groove being so shaped that said member is free from pressure during such withdrawal.

2. A printing press comprising in combi:

nation, an impression cylinder, means, for raising and lowering said cylinder including a cam, a rock shaft, a stud movably mounted in said rockshaft and carrying a roller cooperating with said cam, a cam for moving said stud to withdraw the roller from contact with said cam, and means for actuating said withdrawing cam.

3. A printing press comprising in combination, an impression cylinder, springs for raising said cylinder, and mechanism for lowering said cylinder including co-acting devices, a link connected to said co-acting devices, a stud androller connected to said link, a cam engaging said roller for operating said co-acting devices, and means for withdrawing said roller from contact with said cam, said cam having a circular flange for limiting the movement of the roller when out of engagement with said cam.

4. A printing press comprising in combination, an impression cylinder, springs for raising said cylinder, and mechanism for lowering said cylinder, including co-acting devices, a link connected to said co-acting devices, a stud and roller connected to said link,stops for said coacting devices, a cam engaging said roller for operating said coactingdevices, and means for withdrawing said roller from contact with said cam, said cam being so shaped that said roller is free from pressure when said co-aoting devices are in contact with one of said stops.

5. A printing press comprising in combination, an impression cylinder, yielding means for raisingsaid cylinder, mechanism for lowering said cylinder including co-acting devices, a cam, a roller connected to said co-acting devices and cooperating with said cam, and means for withdrawing said roller from contact with said cam, a manuallyoperated device for actuating said withdrawing means, said Withdrawing means being constructed so as to be ineffective eX- cept when said impression cylinder is raised.

6; A printing press comprising in combination, an impression cylinder, springs for raising said cylinder, and mechanism for lowering said cylinder, including, a toggle lever, a stop cooperating with said toggle lever to limit the upward movement of the cylinder, a link connected to said toggle lever, a stud and roller connected to said link, a cam engaging said roller for operating said toggle lever, and means for withdrawing said roller from contact with said cam, said cam having a circular flange for cam, said cam being so shaped that said roller is free from pressure when said toggle lever is in contact with saidstop.

8. A printing press comprising in combination, an impression cylinder, yielding means for raising said cylinder, mechanism for lowering said cylinder including a toggle lover, a cam, a roller connected to said toggle lever and coiiperating with said cam, and m ians for withdrawing said roller from contact with said cam, a manually-operated device for actuating said withdrawing means,said withdrawing meansbeing constructed so as to be ineffective except when said impression cylinder is raised.

9. A printing press comprising in combination, an impression cylinder, means for raising and lowering said cylinder including a earn, a rock shaft, a stud movably mounted in said rock shaft and carrying a roller cooperatingwith said cam, a cam for mov ingsaid stud to withdraw the roller from contact with the cam, and manually-operated devices for actuating said withdrawing cam.

10. A printing press comprisingin combination, an impression cylinder, means for raising and lowering said cylinder including a cam, a rock shaft, a stud movably mounted in said rock shait and carrying a roller coiiperating with said stud to withdraw the roller from contact with the cam, and manually-operated devices for actuating said withdrawing cam, said withdrawing cam being so shaped and positioned relative to the operating cam as to be ineffective except when the cylinder is raised.

11. A printing press comprising incombination, an impression cylinder, means for raising and lowering sald cylinder mcludmg a cam, a rockshai't,a stud movably mounted in said rock shaft and carrying a roller coiiperating with said stud to withdraw the roller from contact with the cam, and manually-operated yielding devices for actuating said withdrawing cam, said withdrawing cam being so shaped and positioned relative to the operating cam as to be ineffective except when the cylinder is being raised.

12. A printing press comprising in combination, an impression cylinder, means for mounting the impression cylinder including extension impression rods, means for raising the cylinder, mechanism for lowering the cylinder including a toggle lever device, and means for regulating the height of the cylinder including an adjusting screw located centrally between the impressmn rods and projecting downward from the cylinder box and above the toggles.

13. A printing press including an impression cylinder, mechanism for elevating the cylinder, toggle lever mechanism for lowering the cylinder, cam mechanism for governing the operation of the lowering mechanism and including two engageable sand separable elements, and a stop with which the toggle lever mechanism is brought into engagement by the elevating mechanism when the cylinder is elevated to separate said cam elements in the non-printing operation.

14-. A printing press including an impression cylinder, mechanism for elevating the cylinder, mechanism for lowering the cylinder, cam mechanism for governing the operation of the lowering mechanism and including two engageable and separable elements, and a stop with which the lowering mechanism is brought into engagement by the elevating mechanism when the cylinder is elevated to separate said cam elements in the non-printing operation.

15. A printing press including an impression cylinder, mechanism for elevating the cylinder, toggle lever mechanism for lowering the cylinder, cam mechanism for governing the operation of the lowering mechanism, and including two engageable and separable elements, a stop with which the toggle lever mechanism is brought into engagement by the elevating mechanism when the cylinder is elevated to separate said cam elements in the non-printing operation, and mechanism for preventing the cylinder from being brought into printing relation and operable while said cam elements are separated.

16. A printing press including an impression cylinder, mechanism for elevating the cylinder, mechanism for lowering the cylinder, cam mechanism for governing the operation of the lowering mechanism and in cludingtwo engageableand separable elements, a stop with which the lowering mechanism is brought into engagement by the elevating mechanism when the cylinder is elevated to separate said. cam elements in the non-printing operation, and mechanism for preventing the cylinder from being brought into printing relation and. operable while said cam elements are separated.

17. A printing press including an impression cylinder, mechanism for elevating the cylinder, toggle lever mechanism for lowering thecylinder, cam mechanism for governing the operation of the lowering mech anism andincluding two engageable and separable elements a stop with which the toggle levermcchanism is brought into engagement by the elevating mechanism when the cylinder is elevated to separate said cam elements in the non-printing operation, and mechanism for preventing the operative association of said cam elements and op erable when said cam elements have been separated to preventthe cylinder from be ing brought into printing relation.

18. A printing press including an impression cylinder, mechanism for elevating the cylinder, mechanism for lowering the cylinder, cam mechanism for governing the op eration of the lowering mechanism and including two engagcable and separable elements, a stop with which the lowering mechanism is brought into engagement by the elevating mechanism when the cylinder is elevated to separate said cam elements in the non-printing operation, and mechanism for preventing the operative association of said cam elements and operable when said cam elements have been separated to prevent the cylinder from being brought into printing relation,

19. A printing press including an impression cylinder, mechanism for elevating the cylinder, mechanism for lowering the cylinder, cam mechanism for governing the operation of the lowering mechanism, and ineluding two elements which are relatively adjustable to permit them to be thrown into and out of the same plane of operation, and additional cam mechanism for withdrawing one of said elements from the plane of op' eration of the other, said additional cam mechanism including a swinging cam portion having an inclined cam surface and a portion engaged by said cam surface and carried by the cam element which is operated upon by the additional cam mechanism.

20. A printing press including an impression cylinder, mechanism for elevating the cylinder, mechanism for lowering the cylinder, cam mechanism for governing the operation of the lowering mechanism and in-' cluding two elements which are relatively adjustable to permit them to be thrown into and out of the same plane of operation, and additional cam mechanism for withdrawing one of said elements from the plane of operation of the other, said additional cam mechanism including a turning cam portion ments, means for holding the cam elements having an inclined cam surface and a porin separated relation when the cylinder is tion engaged. by said cam surface and carraised, and means operable when said cam ried by the cam element which is operated elements are separated for preventing the 15 5 upon by the additional cam mechanism. cylinder from being lowered.

21. A printing press including an impres- In testimony whereof I afiix my signasion cylinder, mechanism for elevating the ture, in presence of two witnesses. cylinder, mechanism for lowering the cylin- ROBERT MIEHLE. der, cam mechanism for governing the op- Witnesses:

10 eration of the lowering mechanism and in ROBERT F. MIEHLE, J r.,

eluding two engageable and separable ele- C. L. STUR'I'EVANT.

Copies of this patent maybe obtained 1'01 five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

